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Grand Coulee onion
Scientific Name: Allium constrictum
Family: Liliaceae
Category: Monocot
Growth: Forb/herb
Duration: Perennial
Other Names: WA (constricted Douglas' onion)
Grand Coulee Onion (Allium constrictum)
Considerations for Pets
- This plant is an onion, and members of the Allium genus can be toxic to pets.
Considerations for Children
- This plant is an onion, and may be found in gardens or natural settings, potentially attracting the curiosity of children.
The Allium constrictum, commonly known as the Grand Coulee Onion, is a plant species native to the United States.
Taxonomy and Nomenclature
- Scientific Name: Allium constrictum Ownbey & Mingrone P. Peterson, Annable & Rieseberg
- Common Name: Grand Coulee Onion
- Synonym: Allium douglasii Hook. var. constrictum Ownbey & Mingrone
- Type: Forb/herb (a non-woody plant that is not a grass)
Distribution and Habitat
- Endemic to the US State of Washington.
- Specifically known from three counties in east-central Washington.
- Found in shrub-steppe habitat surrounding the Grand Coulee.
- Plants of Upper Grand Coulee, Grant County, WA.
Morphological Characteristics and Growth Habits
- Habit: herb
- Duration: perennial
- Blooms: May - July
Quirky Facts
- The plant's presence near the Grand Coulee Dam relates to new irrigation methods supporting agriculture.
- Slabs of rock that resemble onion skins may be found in the same mid-Upper Grand Coulee area.
Further Information
- Discover Life: Provides information about the biology, natural history, ecology, identification, and distribution of Allium constrictum.
- Garden Guides: Offers plant and identification information.